function v_ci=str2num_ci(table_col)
% input: "table_col": a column from the table
% output: "v_ci": a [Nx2] matrix of CI
c_str =  string(table2cell(table_col));
% remove rows that does not have {"(",")",","}
keys = {'(',')',','};
%
ind_keep = cellfun(@(x) all(cellfun(@(y) contains(x,y),keys,'uni',1)),c_str,'uni',1);
c_keep = c_str(ind_keep);
%
c_keep2 = erase(c_keep,{'(',')'});
v_ci = cell2mat(cellfun(@(x) str2double(strsplit(x,',')),c_keep2,'uni',0));
end